Paper-bag machine.



A. PonrgvlN. PAPER BAG M 1C'HINE.

APPLICATION FILED IAN.2I| |915. I

1 1 76,1 64, Patented Mar. 21, 1916.

UNITED STATES PATENT OFFICE.

ADOLPH POTDEVIN, OF BROOKLYN, NEW YORK, ASSIGNOR TO POTIIEVIN MACHINECOMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

PAIER-BAG MACHINE.

Specification of Letters Patent.

Patented Mai'. 21, 1916.

Original application led November 12, 1912, Serial No. 730,973. Dividedand this application filed January 21, 1915. Serial No. 3,451.

To all whom t may concern:

Be it known that I, ADoLrii Po'rnnv'iN, a. citizen of the United States,andresident of Brooklyn, in the county of Kings and State of New York,have invented certain new and useful Improvements in Paper-Bag Machines,of which the following is a speciication.

In accordance with an official requirement the invention forming thesubject of the present case is divided out'of mypending application,Serial No. 730,973, filed November 12, 1912, for certain improvements inand relating'to machines for making paper bas.

The present invention concerns mechanism for severing successive blanksfrom paper tubing, and it has reference more particularly to means forsevering bag. blanks from tubing preparatory to delivery to bottomiiiginstrument alities.

The invention also comprises, in combination with the severingmechanism, a novel construction and relative arrangement of gripping,drawing and forwarding rollers whereby, with slight adjustment of parts,blanks of various lengths may be uniformly delivered to the bottomingmechanism.

The invention also embodies novel struc-1 tural features, all of whichwill be hereinafter fully described and definitely claimed. In thedrawings-Figure luis a plan of a portion of a bag making machineembodying the preferred form of `my invention. Fig. 2 is a longitudinalvertical section, as on the line 2 2 of Fig. 1. Fig. 3 is a similarsection, enlarged, of the tube cutting mechanism and adjuncts. Fig. 4isa Apartial elevation of the machine, showing driving gearing for thetube-cutting and other mechanisms. v

1 designatesthe main supporting frame, and 2 the main driving shaftjournaled in suitably located bearings `in the sides of the frame. Atone end of the frame is mounted a roll of paper from which the bags areto Abe made, which paper is impelled to suitable pasting and formingdevices by means of which it is progressively converted into anappropriate tube in the usual manner:

At the delivery end of the tube-forming mechanism projects the usualforming'plate 3 which is substantially equal in width.to thev internal`width of the tube and which plate is incased by the'tube during itstravel. The free edge of this plate extends at a right angle to the pathof travel of the tube, or substantially so, and is preferably serratedas at 4. Immediately above the plate andvslightly in rear of itsserrated edge lis a bar 5, the forward edge of which is also preferablyserrated, as at 6. Hence if the leading end of the tube be advancedbeyond the serrated edges. and be securely held, and the portion of thetube contiguousto such edges then be forcibly raised against the latter,the upper and lower sides of the tube will be transversely severed alongthe lines of the serrated edges, with one side of the tube extendingslightly beyond the other.

The progressive feeding of the leading end of the tube to and beyond theserrated cutting members is effected by a pair of rollers 7 whichconstitute part of the usual tube forming mechanism; which rollers areconcertedly driven by appropriate gearing, including the meshing gearwheels 7* (Fig. 4), on their respective shafts.

F orwardly of the cutting members is a pair yof parallel shafts 8provided with intermittently-acting pinch rollers 9 between which theleading end of the traveling tube extends, said rollers lbeing providedwith peripheral ribs 10 which are so disposed as to biteand clamp thetube at predetermined intervals during its travel and thus temporarilyhold the tube. The ends of the roller shafts S. are provided withmeshing gear wheels 11, (the upper one of which appears in Fig. 1) thelower shaft being provided With a gear wheel 12 which is driven from agear wheel 13 on the'driving shaft through an interme'shing idler gear14. Thus the pinch rollers are continuously driven. The timing andrelation of the parts are such that the clamping of the tube by thepinch rollers is effected when the tube is in proper position forseverance at the serrated meinbers. At this juncture auupwardly-traveling bai' 15 is brought forcibly. against the yunder sideof the tube, immediately in front vIn the preferred form of 4myinvention the f v shaft 8 and the lower wheels are fixed to a shaft 19which has its bearings in the sides of the'main frame. The latter shaftis provided at one end with a gear wheel- 20 which meshes with and isdriven bythe idler gear wheel .14above mentioned,\the coperativerelation of the parts to each other beingsuch that in each cycle oftravel of the chains the barl forcibly impinges against the underside ofthe clamped tube and effects the severance of a blank therefrom. Asabove described it will be seen that the active stretches of the chainspass between the pinch rollers and the cuttingmembers, and that as theseclamping and severing mechai nisms comprise continuously rotating partsthey can be effectively driven at a relatively ip vhigh speed.

When the tubing has been advanced into position to be clamped by therollers 9, its free end extends between a pair of drawing rollers- 22,23, one (22) of which is mounted on the main shaft and the other (23)yon an upper parallel shaft 24: VThe periphery of the upper roller ismutilated as at 25 in order that the blank shall be intermittentlygrasped and released by the segmentalacting surface 25 of the roller,such surface being arranged to grasp the blank immediately after it hasbeen severedf` from the body of the tube and released bythe pinchrollers 9,

and being of sufficient circumferential ex-H; tent to advance the blankto the bitev of a pair of forwarding rollers 26, 27 which are carried byparallel shafts 28, ,29, respectively, having their bearings in boxes inthe sides of the main frame. `The roller'23 is secured-to its shaft 24.-by means ofv a setscrew 23 in 'thehub of the roller, whereby saidrollermay be nicely adjusted about the shaftin order to set its'actin'gsurface at any predetermined position in relation 'to h vthe roller. 22,as the length of the blank. may v 45 v e reg-pire.

he shafts of the forwarding rollers 26,

27 are provided at one side of the machine with meshing gear wheels 33,and the lower shaft is provided at the other side of .themachinewithagear wheel 34"ny mesh with an'A idler 35 which, in turn,meshes with the gear wheel 13 on the drive shaft. VThus the rollers 26,27 `are properly driven in Vorder to advance the blank toward thegripper cylinder 36. ,l

As is understoodthe speed at which the tubing is fed to and across thepath of the cutting` and gripping mechanlsms determines the length ofthe blanks, suchspeed being prescribed by the gearing of the feedrollers 7; and as the .cylinder and forwarding rollers are driven at atixedspeed relatively to each other it has heretofore been necessary toadjust them bodily toward and fromthe feed rollers 7 in order to adaptsaid forwarding roller and its correlated bottoming mechanism to receiveblanks of different lengths. By the employment, however, of drawingrollers of the character above described, I am efabled simply by therotary adjustment of the roller 23 to vary its point and period ofengagement with the roller 22 to accord with the predetermined length ofthe blanks and thus accomplish their uniform feeding and delivery totheforwarding roller and gripper cylinder.

vWithout limiting myself to the specific details of construction shownand described, what I claim is 1. The combination with a stationarycutting member, of means in advance thereof for grasping and temporarilyholding the leading portion of'a tube, a bar adapted to travel in a pathadjacent to and at right angles, or substantially so, to the cuttingmember and between said cutting member vand the holding means,continuously moving means carrying said bar, and means for supportingand impelling the last-named means.

2. The combination with a stationary cutting member, of means in advancethereof for grasping and temporarily holding the leading portion ofatube, a bar adapted to travel in a path adjacent to and at right angles,or substantially so, to the cutting member, endless carriers for saidbar, and means for 'supporting and impelling said carriers.

3. vThe combination with a stationary cutting member, of a pair ofrollers in advance ,thereof provided with co-acting pinch ribs, .meansfor continuously rotating said rollers,

a=bar mounted ato travel between said rollers andthe cutting member in aplane at right angles', or substantially so, to the latter, end` lesscarriersfor said bar, and means for supporting and impellingsaidcarriers.

4. Thecombination with la stationary cutting member, vof endlesscarriers, a bar ,con-

. necting the same, means 'for supporting and impellingsaid carriers,whereby the said bar 1s caused to travel in a vertical plane adja-` centthe cutting member, and means located between the'forward and rearwardstretches of the carriers for grasping and temporarily holding theleading portion of a tube.

5, The combination with tube-cutting de vices, and means for feedingmaterial to and across the path thereof, of means succeeding ysaiddevices for' grasping and temporarily nd tem- .blnnls delivered bytheiorwztrrlng rollers.

Signed nturooklyn, 1n the county Of,

lolcl e" `dexwees zuid` that the blank grasped by the Tellers after it ll `hz1S been,severed"f1-mnthe'bolly of the nmte-rial und released bythesnlllmldng dewth forwarding levice to;`

yees, `ltegether yvhxeh the blank is dehvered.

` A 8. The combination` with tube-eutltxlg de- #vil-@gbl inens inadvancethcleol for gjrnsping` und vtempm'nrily holdingtlle lendingportion of u, tube, a `pair of ixltermttently-V {nc-tingl blunk-llx'mvngrollers n advance of snll lmldng menne, one of Suid rollers-hav-` m'llngr lle`rs in advance of said drawing rellms, und n gllpper cyhnder towlng'h the 111g :t segmental acting surface, menn fm" luljnl'illg tbelutter roller in respect to the Qtlxefl in ol'ller` to Yury tlletmeanclperiocl ofopemtion ois-:lid surface, apnnof for? Kingsnnd State ofNew York, this 13th" dan* f'tnesses iT. FETZER, 1H. H. WATRQUS.

